[platform] Detect if running under Rosetta translator (#77)

* Detect whether running under Rosetta translator
Bump `golang.org/x/sys` package to latest version

* Fix merge
Bump sys package

go.mod

@@ -10,5 +10,5 @@ require (
 	github.com/shirou/gopsutil v2.0.0+incompatible
 	github.com/shirou/w32 v0.0.0-20160930032740-bb4de0191aa4 // indirect
 	github.com/stretchr/testify v1.3.0
-	golang.org/x/sys v0.0.0-20170329061634-9a7256cb28ed
+	golang.org/x/sys v0.0.0-20210303074136-134d130e1a04
 )

go.sum

@@ -18,3 +18,5 @@ github.com/stretchr/testify v1.3.0 h1:TivCn/peBQ7UY8ooIcPgZFpTNSz0Q2U6UrFlUfqbe0
 github.com/stretchr/testify v1.3.0/go.mod h1:M5WIy9Dh21IEIfnGCwXGc5bZfKNJtfHm1UVUgZn+9EI=
 golang.org/x/sys v0.0.0-20170329061634-9a7256cb28ed h1:1RoWulWaFGB+t8NExLratqmgydjWzGMhG2wyOqZxifQ=
 golang.org/x/sys v0.0.0-20170329061634-9a7256cb28ed/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
+golang.org/x/sys v0.0.0-20210303074136-134d130e1a04 h1:cEhElsAv9LUt9ZUUocxzWe05oFLVd+AA2nstydTeI8g=
+golang.org/x/sys v0.0.0-20210303074136-134d130e1a04/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=

platform/platform_darwin.go

@@ -1,14 +1,40 @@
 package platform
 
-import "strings"
+import (
+	"strings"
+
+	log "github.com/cihub/seelog"
+	"golang.org/x/sys/unix"
+)
 
 var unameOptions = []string{"-s", "-n", "-r", "-m", "-p"}
 
+// processIsTranslated detects if the process using gohai is running under the Rosetta 2 translator
+func processIsTranslated() (bool, error) {
+	// https://developer.apple.com/documentation/apple_silicon/about_the_rosetta_translation_environment#3616845
+	ret, err := unix.SysctlUint32("sysctl.proc_translated")
+
+	if err == nil {
+		return ret == 1, nil
+	} else if err.(unix.Errno) == unix.ENOENT {
+		return false, nil
+	}
+	return false, err
+}
+
 func updateArchInfo(archInfo map[string]interface{}, values []string) {
 	archInfo["kernel_name"] = values[0]
 	archInfo["hostname"] = values[1]
 	archInfo["kernel_release"] = values[2]
 	archInfo["machine"] = values[3]
 	archInfo["processor"] = strings.Trim(values[4], "\n")
 	archInfo["os"] = values[0]
+
+	if isTranslated, err := processIsTranslated(); err == nil && isTranslated {
+		log.Debug("Running under Rosetta translator; overriding architecture values")
+		archInfo["processor"] = "arm"
+		archInfo["machine"] = "arm64"
+	} else if err != nil {
+		log.Debugf("Error when detecting Rosetta translator: %s", err)
+	}
 }